Programming Blog
Web development , php , ajax , symfony, framework, zend
Thomas Edison created the electric lightbulb and then wrapped an entire industry around it. The lightbulb is most often thought of as his signature invention, but Edison understood that the bulb was little more than a parlor trick without a system of electric power generation and transmission to make it truly useful. So he created that, too.
Join Tim Brown’s ongoing discussion at his blog Design Thinking: http://designthinking.ideo.com/
About the Author
Tim Brown is the CEO and president of IDEO. He formerly led IDEO’s San Francisco and European offices. Tim speaks regularly on the value of design thinking and innovation to business and design audiences around the world.
Click the link below to download PDF article.
Comment Form
About this blog
This blog delivers stylish and dynamic news for designers and web-developers on all subjects of design, ranging from: CSS, Ajax, Javascript, web design, graphics, typography, advertising & much more. Our goal is to help you communicate effectively on the web with an engaging website or functional interface.
1 Response to Design Thinking
kirchwey
January 31st, 2010 at 3:56 am
Both; the water should come to a dead stop in absolute velocity, which is a backward speed relative to the moving turbine blades, obtained by rebound. In an impulse turbine (ref.), if the water rebounds from the moving turbine blade so its absolute speed is nearly zero, it transfers almost all of its forward momentum to the blade. It doesn't have to rebound straight backwards but in a direction that provides forward momentum to the blade. Remember that the blades can be canted with respect to the turbine axis and/or curved to make this possible. It turns out that impulse turbine efficiency is maximum when the blade speed equals half the water-jet speed. This adjustment is made by adjusting the load on the turbine.